WORLDS OF CARTRIDGES Remanufactured Toner Cartridge Replacement for HP C8061A (61A) / C8061X / (61X) (Jumbo Black: 67% Higher Yield compared to C8061A). Each product is individually print tested and guaranteed to perform with compatible OEM fax/printer and does not void your fax/printer's warranty. FOR USE IN: HP LaserJet 4100, 4100dtn, 4100n, 4100tn, 4100 mfp, 4101 mfp. YIELD: 10,000 pages (@ 5% coverage). WORLDS OF CARTRIDGES products are guaranteed to meet or exceed original OEM products in both print quality and page yield. They are primarily made in ISO 9001/14001 and STMC quality certified factories using the highest quality new and recycled components. WARRANTY: Premium 100% full lifetime guarantee. See WORLDS OF CARTRIDGES profile page for more information.